StringBuilder Test9()
        {
            StringBuilder s = new StringBuilder();

            s.Append("\n   - SemiExpression class extends the interface ITokCollection shown in requirement 3.");
            s.Append("\n   - This Interface have one function that is getSemi()");
            s.Append("\n   - SemiExpression class implements this function and for now returns one Semi-Expression");
            s.Append("\n   - This function can be found on line 89 of file :-");
            string p  = "../..";
            string pr = Directory.GetParent(p).ToString();

            s.Append("\n   - " + pr + "\\SemiExpress\\Semi_Exp.cs");
            s.Append("\n   - This function Implements as follows");
            s.Append(Demo_semi.Test_inter(pr + "\\Toker\\testSemi.txt"));
            s.Append("\n   - Another SemiExpression from different file.");
            s.Append(Demo_semi.Test_inter(pr + "\\Toker\\Test.txt"));
            return(s);
        }
        StringBuilder Test6(string p)
        {
            StringBuilder s   = new StringBuilder();
            string        pr  = Directory.GetParent(p).ToString();
            string        prr = Directory.GetParent(p).ToString();

            s.Append("\n   - Test File for requirement 6 is :-").Append("\n   - " + pr + "\\Toker\\testSemi.txt");
            s.Append("\n   - The file has been divided as semiexpression.");
            s.Append("\n   - according to all the rules described in requirement 7,8");
            s.Append("\n   - This uses a semiex() function which extractes token unitll endcondition() is met.");
            s.Append("\n   - This function can be found in file").Append("\n   - " + prr + "\\SemiExpress\\Semi_Exp.cs");
            s.Append("\n   - On line No. 33.");
            s.Append("\n   - ").Append('-', 100);
            s.Append("\n   - SemiExpression").Append(' ', 47).Append("| Conditions");
            s.Append("\n   - ").Append('-', 100);
            s.Append(Demo_semi.Test_semi(pr + "\\Toker\\testSemi.txt"));

            return(s);
        }